Thumb guard



FIG. 1 is a top plan view of a thumb guard according to the presentinvention.

FIG. 2 is a bottom plan view of the thumb guard shown in FIG. 1.

FIG. 3 is a right side elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a rear end view thereof.

FIG. 6 is a front end view thereof; and,

FIG. 7 is a front/top/left side perspective view thereof. The user'shand shown in broken lines illustrates how the thumb guard is worn andforms no part of the claimed design.

CLAIM The ornamental design for a thumb guard, as shown and described.